As a rather large person who is working on losing weight himself (I'm down 55 lbs from 300), I can say don't underestimate weight lifting. It boosts your metabolism and muscles burn more calories then fat does. What that means is, if you've got more muscle and you eat the same calories, you'll loose weight. However, don't do what I see a lot of us fatties doing. Sure you could probably chess press 250 lbs if you throw all your weight into it, but it doesn't do you any good. Lift just enough weight so that by the 3rd set of 12 reps you can't lift anymore. Any more then that and you'll just be building up bulk which can get discouraging as you don't look smaller. Also don't rely too much on a diet. It's not that reasonable of a food intake and you'll eventually stop dieting and put it all back on. Instead go for a change in eating habits. My only other suggestion is to find a low cal snack to munch on. I either chew gum (5 calories) or eat plain sunflower seeds (the large bag is about 400 cal total so don't eat the whole thing). Hope this helps and good luck with the weight loss.